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author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-23 10:07:49 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-23 10:07:49 -0700 |
commit | a7c367b95a9d8e65e0f0e7da31f700a556794efb (patch) | |
tree | 5b1bb202801e29e3237381aa7aad5aa288378d5b /Documentation | |
parent | 15f964bed054821d6d940d3752508c5f96a9ffd3 (diff) | |
parent | e1070211f7327a1f197d535aa886f721a241c32f (diff) | |
download | op-kernel-dev-a7c367b95a9d8e65e0f0e7da31f700a556794efb.zip op-kernel-dev-a7c367b95a9d8e65e0f0e7da31f700a556794efb.tar.gz |
Merge git://git.infradead.org/mtd-2.6
* git://git.infradead.org/mtd-2.6: (58 commits)
mtd: jedec_probe: add PSD4256G6V id
mtd: OneNand support for Nomadik 8815 SoC (on NHK8815 board)
mtd: nand: driver for Nomadik 8815 SoC (on NHK8815 board)
m25p80: Add Spansion S25FL129P serial flashes
jffs2: Use SLAB_HWCACHE_ALIGN for jffs2_raw_{dirent,inode} slabs
mtd: sh_flctl: register sh_flctl using platform_driver_probe()
mtd: nand: txx9ndfmc: transfer 512 byte at a time if possible
mtd: nand: fix tmio_nand ecc correction
mtd: nand: add __nand_correct_data helper function
mtd: cfi_cmdset_0002: add 0xFF intolerance for M29W128G
mtd: inftl: fix fold chain block number
mtd: jedec: fix compilation problem with I28F640C3B definition
mtd: nand: fix ECC Correction bug for SMC ordering for NDFC driver
mtd: ofpart: Check availability of reg property instead of name property
driver/Makefile: Initialize "mtd" and "spi" before "net"
mtd: omap: adding DMA mode support in nand prefetch/post-write
mtd: omap: add support for nand prefetch-read and post-write
mtd: add nand support for w90p910 (v2)
mtd: maps: add mtd-ram support to physmap_of
mtd: pxa3xx_nand: add single-bit error corrections reporting
...
Diffstat (limited to 'Documentation')
-rw-r--r-- | Documentation/powerpc/dts-bindings/mtd-physmap.txt | 42 |
1 files changed, 26 insertions, 16 deletions
diff --git a/Documentation/powerpc/dts-bindings/mtd-physmap.txt b/Documentation/powerpc/dts-bindings/mtd-physmap.txt index 667c9bd..80152cb 100644 --- a/Documentation/powerpc/dts-bindings/mtd-physmap.txt +++ b/Documentation/powerpc/dts-bindings/mtd-physmap.txt @@ -1,18 +1,19 @@ -CFI or JEDEC memory-mapped NOR flash +CFI or JEDEC memory-mapped NOR flash, MTD-RAM (NVRAM...) Flash chips (Memory Technology Devices) are often used for solid state file systems on embedded devices. - - compatible : should contain the specific model of flash chip(s) - used, if known, followed by either "cfi-flash" or "jedec-flash" - - reg : Address range(s) of the flash chip(s) + - compatible : should contain the specific model of mtd chip(s) + used, if known, followed by either "cfi-flash", "jedec-flash" + or "mtd-ram". + - reg : Address range(s) of the mtd chip(s) It's possible to (optionally) define multiple "reg" tuples so that - non-identical NOR chips can be described in one flash node. - - bank-width : Width (in bytes) of the flash bank. Equal to the + non-identical chips can be described in one node. + - bank-width : Width (in bytes) of the bank. Equal to the device width times the number of interleaved chips. - - device-width : (optional) Width of a single flash chip. If + - device-width : (optional) Width of a single mtd chip. If omitted, assumed to be equal to 'bank-width'. - - #address-cells, #size-cells : Must be present if the flash has + - #address-cells, #size-cells : Must be present if the device has sub-nodes representing partitions (see below). In this case both #address-cells and #size-cells must be equal to 1. @@ -22,24 +23,24 @@ are defined: - vendor-id : Contains the flash chip's vendor id (1 byte). - device-id : Contains the flash chip's device id (1 byte). -In addition to the information on the flash bank itself, the +In addition to the information on the mtd bank itself, the device tree may optionally contain additional information -describing partitions of the flash address space. This can be +describing partitions of the address space. This can be used on platforms which have strong conventions about which -portions of the flash are used for what purposes, but which don't +portions of a flash are used for what purposes, but which don't use an on-flash partition table such as RedBoot. -Each partition is represented as a sub-node of the flash device. +Each partition is represented as a sub-node of the mtd device. Each node's name represents the name of the corresponding -partition of the flash device. +partition of the mtd device. Flash partitions - - reg : The partition's offset and size within the flash bank. - - label : (optional) The label / name for this flash partition. + - reg : The partition's offset and size within the mtd bank. + - label : (optional) The label / name for this partition. If omitted, the label is taken from the node name (excluding the unit address). - read-only : (optional) This parameter, if present, is a hint to - Linux that this flash partition should only be mounted + Linux that this partition should only be mounted read-only. This is usually used for flash partitions containing early-boot firmware images or data which should not be clobbered. @@ -78,3 +79,12 @@ Here an example with multiple "reg" tuples: reg = <0 0x04000000>; }; }; + +An example using SRAM: + + sram@2,0 { + compatible = "samsung,k6f1616u6a", "mtd-ram"; + reg = <2 0 0x00200000>; + bank-width = <2>; + }; + |